Both VINs do indicate shortbed. The A pillar could be legit, as I said, If it was supervised by the DMV. Check your documentation to see if it indicates a rebuilt, salvage, bonded or any other "special" designation. It seems like a person wanting to be sketchy would have for sure removed the other plate. It may be that DMV wanted it to stay in order to document the was/is. Some GMC cabs had the holes on the A pillar because parts were interchangeable and possibly made by same vendor or factory early on.
As Jerry says, this only matters if you ever sell or your DMV requires inspection during transfer. Where I live, they never see the truck when title is transferred.
I don't know what Jerry means when he says the Chevy and GMC "VIN numbers match"
NICE LOOKING TRUCK!
VERY hard to figure out how a GMC cab got a seemingly complete Chevy Dash. Could be "The Canadian factor".
